Verbseoul.
하다 verb
주장하다jujanghadato make a claim or assertion

To say to make a claim or assertion politely in the present tense, use 주장해요 (choo-chahng-hae-yoh). Below is the full conjugation of 주장하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
주장해
choo-chahng-hae
주장해요
choo-chahng-hae-yoh
주장합니다
choo-chahng-hahm-nee-dah
Past
주장했어
choo-chahng-hae-ssuh
주장했어요
choo-chahng-hae-ssuh-yoh
주장했습니다
choo-chahng-hae-sseum-nee-dah
Future
주장할 거야
choo-chahng-hahl- -guh-yah
주장할 거예요
choo-chahng-hahl- -guh-yae-yoh
주장할 겁니다
choo-chahng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
주장하세요
choo-chahng-hah-sae-yoh
Suggestion / Let's Polite (요)
주장해요
choo-chahng-hae-yoh
Question Polite (요)
주장해요?
choo-chahng-hae-yoh-?
Connective “and” — (고)
주장하고
choo-chahng-hah-goh
Conditional “if” — (면)
주장하면
choo-chahng-hah-myuhn
Noun form — (기)
주장함
choo-chahng-hahm